1241868809 has 2 divisors, whose sum is σ = 1241868810. Its totient is φ = 1241868808.

The previous prime is 1241868799. The next prime is 1241868833. The reversal of 1241868809 is 9088681421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1032979600 + 208889209 = 32140^2 + 14453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241868809 - 2⁸ = 1241868553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1241868109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620934404 + 620934405.

It is an arithmetic number, because the mean of its divisors is an integer number (620934405).

Almost surely, 2^1241868809 is an apocalyptic number.

It is an amenable number.

1241868809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241868809 is an equidigital number, since it uses as much as digits as its factorization.

1241868809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 1241868809 is about 35240.1590376661. The cubic root of 1241868809 is about 1074.8765126587.

The spelling of 1241868809 in words is "one billion, two hundred forty-one million, eight hundred sixty-eight thousand, eight hundred nine".